49ers seek to limit big-play opportunities against Cardinals

PITTSBURGH, PA - SEPTEMBER 20: Defensive Backs Coach Tim Lewis of the San Francisco 49ers talks with Eric Reid #35 and Tramaine Brock #26 on the sideline during the game against the Pittsburgh Steelers at Heinz Field on September 20, 2015 in Pittsburgh, Pennsylvania. The Steelers defeated the 49ers 43-18. (Photo by Michael Zagaris/San Francisco 49ers/Getty Images)

If there was any one area on defense where the 49ers struggled in Week 2, it was giving up the big play.

"We've got to make sure they're not behind us," head coach Jim Tomsula said, via the San Francisco Chronicle. "We don't want to give up the big play. I've been here nine years, and that's always what we talk about -- stop the run and prevent the big play."